You can make your TOTA profile Private by going to Your Account in the sidebar. Clicking that link will take you to your Account Info page (https://www.tota.world/account/). Above the "first name" field, there's a checkbox marked "Make my Profile Private". Mark this checkbox and click the "Save your account details" button at the bottom of the page to make your account private.
If you have a Private profile, your real name will not be displayed on TOTA, only your username.